Ensure output directory existence

This partially fixes #736.

Author: badeball

features/issues/736.feature

@@ -0,0 +1,33 @@
+# https://github.com/badeball/cypress-cucumber-preprocessor/issues/736
+
+Feature: create output directories
+  Background:
+    Given additional preprocessor configuration
+      """
+      {
+        "messages": {
+          "enabled": true,
+          "output": "foo/cucumber-messages.ndjson"
+        },
+        "json": {
+          "enabled": true,
+          "output": "bar/cucumber-report.json"
+        }
+      }
+      """
+    And I've ensured cucumber-json-formatter is installed
+
+  Scenario:
+    Given a file named "cypress/e2e/a.feature" with:
+      """
+      Feature: a feature
+        Scenario: a scenario
+          Given a step
+      """
+    And a file named "cypress/support/step_definitions/steps.js" with:
+      """
+      const { Given } = require("@badeball/cypress-cucumber-preprocessor");
+      Given("a step", function() {})
+      """
+    When I run cypress
+    Then it passes

lib/add-cucumber-preprocessor-plugin.ts

@@ -91,6 +91,8 @@ export async function afterRunHandler(config: Cypress.PluginConfigOptions) {
     return;
   }
 
+  await fs.mkdir(path.dirname(jsonPath), { recursive: true });
+
   const messages = await fs.open(messagesPath, "r");
 
   try {
@@ -156,6 +158,8 @@ export async function afterSpecHandler(
       )
     );
   } else {
+    await fs.mkdir(path.dirname(messagesPath), { recursive: true });
+
     await fs.writeFile(
       messagesPath,
       currentSpecMessages.map((message) => JSON.stringify(message)).join("\n") +